I'm running SL 10.6.1 on a Mac Mini 2.26.

I tried this and after setting up my FTP site on a web drive, I selected "mount" from the options and got a message "successfully mounted." However, that was the dying gasp of my system as the entire Mac froze. No Finder, no Safari, couldn't force quit, nothing except to hold the power button in for several seconds. Tried again, same result.

I went and downloaded AutomountMaker as another commenter suggested and it does indeed work fine in SL. Easy to set up, no need for the app to run (Webdrive requires you to select a drive from within the app), it just creates a script that mounts the drive. I've got the script in my Finder side bar and clicking simply mounts my remote servers. Slicker than ice in the Antarctic. Aside: My only gripe about AutomountMaker is that it always comes up in icon mode rather than list mode but that's a real small nitpick.

Another choice is Expandrive (listed here on VT) but it runs $40.